MailBee POP3 component can be used together with MailBee S/MIME and MailBee SMTP components. For instance, it's possible to download e-mail from POP3 server, modify it and resend it to SMTP server.

MailBee.dll is available in 32-bit and 64-bit versions. It's very light-weight and has no visual interface (pure COM component). Works in all Windows versions from 2000 to 2016 with most languages which support ActiveX. Samples are available for Delphi, Visual Basic 6, classic ASP, Visual C++, and Cold Fusion. Royalty-free distribution.